Question 97660
write a formula for the nth term of arithmetic sequence...
==> -4,-2,0,2,4,...
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The formula for the nth term of an arithmetic sequence is
a(n) = a(1)+(n-1)d
a(1) is the 1st term of the sequence
d is the difference between any term and the one before it.
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Your Problem
The 1st term is -4
d = 2-0 = 2
So the nth term is a(n)=-4+(n-1)*2
a(n) = -4+2n-2
a(n) = -6+2n
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Cheers,
Stan H.